Heel-breasting machine.



E. ERUKSON. HEEL BBEASTNG MACHINE.

NEN NOV, 32, 1912. 1 .067,216. Patented July 8,19l3

4 SHBEISSHEBT 2.

B ,Ewa/Zan 5 ,Kiwa/m62 177mb 7650/ c @www G MAUHIiNH,

JEU/5,1907 mNismD Nov4 12,

mir

Patented Jujy' 8, i913.

X51/venan all@ E. ERICKSON.

HEEL BREASTING MACHINE.

APPLIGATON FILED JU 1,067,216.

LY 5,1907. RENEWED NOV. 12,1912.

Patented July 8, 1913 i sums-SHEET 4.

raged by the shank of the shoe when the i stroke of the knife each time a. treadle is de- UNITED STATES vIAEN'I OFFICE.

EDWARD ERICKSON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE IBOYLSTON MAN- UFACTURING COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF NEW JERSEY.

HEEL-BREASTING MACHINE.

To all whom/15 may concern Be it known that I, Finwaun ERICKSON, otl Boston, in the county of 'Suffolk and State of Massachusetts, have invented certain new and useful Iniprovements in IIcel-Breasting Machines, of which the following is a specification.

This invention relates to. heel breasting machines and has for its object to provide a machine which shall trim the breast of a heel on a shoe supported thereon in such a way that the trimming knife shall in every case, cut precisely to and yet not into the shank of the shoe, regardless of whatever Variation .may exist in the thickness of theV heels of different shoes thus trimmed.

In a machine of this kind, the depth of the cutshould always be such as to extend to the shank of. the shoe so as to insure a cleanly cut surface on all parts of the breast of the heel, and yet the cut should notbe so deep as to enter into the shank of the shoe. By cutting' into the shank of a shoe, as some machines do, especially when the shoe is provided with a heel somewhat thinner than thatfor which the machine is adjusted, not only is the appearance of the shoe impaired but the shank is correspondingly weakened at that point. The present invention provides a machine which may be operated upon shoes having heels of varying thicknesses and having shanks of var vingsthicknesses, in such a way as to avoid all possibility of eutting into the shank itself and yet so as to insure a clean cut to the full depth of thtl heel. To this end the machine is provided with a fixed stop which is interposed between the work-support` or jack and the' cuttingknife, and which is adapted to be enjack and shoe are raised to operative position and so to determine the operative position of the shoe by arrestingr its movement toward the knife. By thus arranging` the fixed stop with relation to the work-support and the cutting knife, the point of the. shoe to which the knife is intended to cut is in every case positioned coincidentally with the extent to which the knife capable of cutting.

ln connection with the work-supporting mechanism, the machine is provided with an improved clutch controlling mechanism which is adapted to cause a single cutting Specification of Letters Patent.

Patented July 8, 1913.

Renewed November 12, 1912. Serial No. 731,037.

pressed to raise the work into operative position.

Referring now to the accompanying drawings forming a part of this specification,- Figure 1 is a front elevation of a heel breasting machine constructed in accordance with this invention. Fig. 2 is a side elevation with certain parts shown in vertical section. Fig. 3 is a section on the line o Fig. Q. Fig. 4 is a section on the line 1"4: of Fig. 1. Fig. 5 is a detail elevation of the clutch members in disengaged position. Fig. ti is an elevation of a portion of the mechanism which raises the work-support. Fig. 7 is a vertical section of the cutting knife in connection with a shoe supported on the jack. Fig. S is a detail View of a portion of the clutch-controlling mechanism shown by Fig. 3 in a different position.

The same reference characters indicate the same parts wherever they occur.

The frame l() of the machine is provided as usual with a work-support or movable jack 1l, a movable cuttingr knife l2, and the various` mechanisms hereinafter described for operating one in connection with the other. The jack l1 is below the knife and movable toward and from it in alinement therewith. The jack ll is supported by an upright` shaft i3. to which it is pivoted by a stud 14. The shaft lil is held in stationary bearings l5 l5 in a portieri of the frame and is adapted to be vertically reciproeated to raise or lower the jack. The real.son for providingr the pivotal connection of the jack at ll is to permit the jack to be tilted out of alinemcnt with the shaft 13 so as to cnabic the. operator to more readily insert or remove the work. The means for raising the jack comprises a pair of cam members 1G and 17 mounted on the shaft 13, and of which the former is pinned or otherwise secured to the shaft 13 and the latter adapted to rotate relatively thereto.- The shaft 123 is prevented from turning in its bearings by a. cross-head 1S affixed to the lower end thereof and adapted to slide up and down between guides 1t) formed on the frame. The cam members 1G and 17 have faces Q0 and 21 which permit the said members to set into each other, as shown in Figs. l and 2, and which are adapted to cooperate when the member 17 is rotated so as to raise the member 16. -For the purpose of rotating the cam 17, it is provided with a pinion 22 which rests upon the lower bearing l5 of the frame. The said pinion intermeshes With a rack 23 which is adapted to be reciprocated in stationary bearings 24 24 by means hereinafter described. Referring now more to the cam members 16 and 17. it Will be observed that they have square end faces 25 and 26 respectively, which en `trage with each other when the member 16 has been raised to `its full height. These squared end faces permit subsequent rotation of the cam 17 after the cam 16 has been raised, and by so doing, they transfer the entire weight and pressure of the work-support to the frame of the machine, thus relieving the pinion and rack 23 of the retro-active effect of the work-support, (see Fig. 6).

The rack 23 is connected by a link 27 to the free end of an arm 28 rigidly secured upon a rock shaft 29. The rock shaftis mounted in stationary bearings 530 3() on the base of the frame. 1() and is provided with a treadle 31 by which it may be manually oscillated. The rock shaft 29 is further provided with a rigidly secured arm 32 which is connected by a spring 38 to a suitable tixture. The spring 33 normally holds the rock shaft 29 and the jack raising mechanism connected to it, in the positions shown by Figs. 1, 2, and 4 in which the jack is in its retracted position.

The jack 1l is provided with a fixed head 34 to which is pivoted a tilting` block 35 upon which a shoe may rest when placed upon the jack. The free end of the tilting block 35 is adjustably supported at any desired inclination by means of a stud. 36 screw-threaded into the head 34. By this means the inclination of a shoe a, (see Fig. 7), may be determined with relation to the cutting knife 12 so as to cause the latter to `give to the breast of the heel either a square or an undercut face as hereinafter described. \Vhen a shoe is mounted upon the jack, as shown in Fig. 7 and is raised into operative position by the means hereinbefore described, its shank is adapted to abut against a fixed stop 37 attached to and projecting forwardly from the frame 10. The stop 37 is adapted to arrest the upward movement of the shoe at such a point that the outer surface of the shank b of any thickness whatsoever, shall stop at a predetermined level. Vhen the shoe is brought to this position, the heel o engages a flat plate 38 pivotally mounted at the lower end of a rod Il!) which is mounted in a fixed bearing 40, and depressed by a springr 4l which permits the rod to yield upwardly. The rod is provided with lock nuts 42 and a longitudinal slot 43 adapted to receive the end of a stud 44. The stud is screw-threaded in the bearing 46. The stud prevents t-urningbr of the rod 3.) but permits it to slide longitudinally. By this means, the shoe is securely held in its operative position upon the jack.

The knife 12 is mounted in a head 45 and clamped therein by means of a block 46 and screw bolts 47 and adjusted with relation to the clamping means by set screws 48. The head 45 is provided with a pair of parallel shafts 49 and 50 which are mounted in stationary bearings 51 on the frame 10, on which they are adapted to be vertically rteiprooated as hereinafter described. By reference to Fig. 2, it will be seen that both ends of the shaft 49 have fixed 'bearings 51, and that only the upper end of the shaft 50 has a fixed l'iearing 51. rlhe lower end of the shaft 50 is screw-threaded into a movable crossliead 52. The cross-head is mounted in a guide 53 in which it is adapted to be vertically rcciprocated by a connectingrod 54 whose lower end is connected to a crank pin 55 affixed to the forward end of a driving shaft 56. By means of the crank pin 55 and the connecting rod 54, the cross-head 52 is adapted to be reeiprocated within a definite range of movement, and the head 45 is adapted to be adjusted relatively to the cross-head 52 by means of the screw-threaded connection between the shaft 50 and the cross-head. For this purpose, the shaft 50 is provided with a fixed hand wheel 57, by which it may be turned, and a lock nut 58 by which it may be prevented from turning. The hand wheel 57 is set in the head 45 in such a way that, while it may be turned relatively thereto to adjust the shaft 50, it cannot move vertically without moving the head 45 With it.

The forward end of the driving` shaft l56 has its bearingr in arigid cross-piece 57 of the frame, while the rear end thereof has its bearing in a sleeve 58 which is adapted to rotate relatively thereto. The rear end of the sleeve 58 is provided with a driving pulley 59 and the forward end thereof is provided with a fly-wheel 60, both of which are keyed to the sleeve. That portion of the sleeve 58 intervening between pulley 59 and fly-wheel G0 is mounted and adapted to rotate in a bearing 61 on the frame 10. By means of so constructing and mounting the members 5S, 59 and 60, they are adapted to be driven and rotated as a unit Without affecting the shaft 56. The forward end of the sleeve 58 is provided with clutch teeth 62 which are adapted to be engaged by and to rotate a collar 63 splined upon the shaft 56, and having complemental clutch teeth 64. The collar 63 is normally held by a spring 65 so that its teeth are in operative engagement with the teeth on the sleeve 58, thus establishing a driving connection between the pulley 59 and the shaft. The collar is also provided with a circumferential groove 66 of which the greater part is in a plane at right angles to the shaft, and of which one end is inclined to that plane so as to form a cam face 67. The groove 66 is adapted to receive an antif-riotion rolil 68 mounted upon one end of a rod vor controller- 69. The contnolller 69 is mounted in a fixed bearing on the frame and is provided with a spring 70 which normally tends to force the roll G8 into the groove 66, andconsequently into the path o-f rotation .of a shoulder 71 at the inclined end orf the groove GG. Thus when the roll 68 occupies the .groove (36, it not only holds the teeth 64 away from the teeth 62, but it holds the collar and consequently the shaft 56 against rotation. When it is desined to let the 'movable clutch member into operative engagement with the relatively stationary clutch member so as to establish driving connection between the pulley 59 and the driving shaft, the controller 69 is retracted against .the tension of the spring 70 by the'means hereinafter described.

As hereinbefore stated, the rock shaft 29 is provided with an arm 32, by which it is lheld in normal position through the agency of the spr-ing 33. The free end of this arm 32 .is adapted to engage and move a dog 72 which -is pivotally connected by a pin -73 to a yoke 74 affixed to the outer end of the controller.V The under face of the dog 72 is adapted to rest by gravity upon a stationarily mounted antifrictionyroll 75, by which the dog is supported when in its normal position so that its free end lies in the path of movement of the free end of the arm 32.

The operation of the machine is as follows, assumingv that the clutch members are disengaged, and that the jack 11 is in its depressed or retracted position. The shoe is rst placed upon the heel rest 35, as shown in Fig. 7, and the jack 11 tilted on its pivot 14 so that it stands in alinement with the upright shaft 13 and the knife 12. 'hen the jack is in this position, the treadle 31 is elevated and the arm 32 is in the position indicated by dotted lines in Fig. 3. The lirst step on the part of the operator is to depress the treadle so as to rock the shaft 29 and cause the latter through its several connections, to rotate the cam member 17 and so raise the jack to operative position. When so rotated, the member 17 takes the position shown in Fig. 6, and the arm 32 takes the position shown by full lines in Fig. 3. By comparison of these two figures, it will be seen that the squared end 26 of the cam 17 moves into engagement with the squared end 25 of the member 16, thus relieving the rock shaft of the Weight and pressureA of thejack before the arm 32 engages the free end of the dog 72. This operation of moving the jack into operative position may occupy approximately onehalf of the downward movement of the treadle. Subsequentdownward movement of the treadle causes the arm 32 to move farther to the right as in Fig. 3, lthereby moving the dog 72, the yoke 7 4 and the controller 69 also to the right. The roll 68 is thus withdrawn from the groove 66 in the collar 63 and the spring 65 then pro- 'jects the collar so that the teeth 64 operatively engage the teeth 62 and establish driving connection between the sleeve 5S and the shaft 56.` liVhen the collar l63 is thus thrown into engagement with the sleeve 58, the entrance to the groove 66 v)mug-nt into alinement with the r-oll 68, and `the collar then rotates with the sleeve. The under face of the dog 72 is pro-vided with` an inclined face 76 which causes the free end of the dog to rise as it advances relatively to the roll. When the dog 72 has advanced so far as to cause the complete withdrawal of the roll 68 from the groove 66, the free end `of the dog 72 is so far raised by reason of its inclined face 76 that it becomes disengaged from the free end of the arm 32 and is subsequently projected back to its former position by the spring 70. By the time this latter movement of the dog takes place, the collar 63 has been partially rotated by the clutch-in the direction of the arrow in Fig. 3, thereby earrying the entrance to the groove 66 into a position where it registers with the roll 68. As the collar 63 continues to rotate, the roll enters into the groove GG by reason of the action of the spring 70. When the inclined portion 67 of the groove 66 moves into engagement with the roll 68, the collar 63 is 'thereby moved again v,away from the sleeve 58 so that the teeth 64 and 62 become disengaged (sce Fig. 5) and the shoulder 71 at the end of the groove 66 once more engages the roll 68 by which its rotation vis arrested. The collar 63 has thus been permitted to make one complete revolution thereby imparting to thephead 45 and the cutting vknife 12, a downward and an upward stroke.

During the last described operation, the treadle 31 is held in its depressed position in which the free end of the arm 32 and the dog 72 occupy the position shown by F ig. 8. This completes the cutting operation and the shoe is then 'ready to be removed from the jack. When the operator releases the treadle 31, it is elevated by ill() reason of the tension exerted by the spring 33 upon the arm 32, and the rock shaft 29 is therefore rocked so as to cause the cam member 17 to return to its initial position as shown in Figs. 1 and 2. The jack is therefore permitted to gravitateto its retracted position so that it may be swung about its pivot 14 sulliciently to permit the removal of the shoe.

ln adjusting the knife 12, it is important to so position it with relation to the head 45 that, when the 'head is reciprocated to its lowest position, the cutting edge of the knife shall descend precisely to the transverse plane of the under surface of the fixed stop or work gage 37. It will be apparent therefore that when .the knife is so adjusted and the upper surfacerof the shank b is held in engagement with the under surface of the work gage 37, that the knife in its downward stroke will descend precisely to and yet not into the shank. The cutting edge of the knife is preferably curved so as to conform to the curvature of the shank, in which case, the arch of the cutting edge is adjusted to cut to the plane of the Work gage. When the Work rest, work gage, and

the cutting knife are so constructed and arranged and operated with relation to each other, it is clear that the cutting knife must in every case, cut completely down to the shank of the shoe, and that it cannot in any case cut beyond the surface of the shank irrespective of whatever may be the thickness of the heel or of the shank. So in trim ming the breast of the heels of a great num' ber of shoes, there is no necessity for varying the adjustment of these coperating parts'to compensate for varying thicknesses ofthe Work. v

Having thus explained the nature of my said invention and described a way of constructing and using the same, although,

without. attempting to set forth all of the forms in which it may be made, or all of the modes of its use, I declare that what I claim is 1. A heel-breasting machine comprising a main frame, a movable jack for the shoe to be breasted, a rest plate for engagement with the face of the heel, spring-tensioned means connecting said rest plate to the main frame, an unyielding reciprocatory knife and knife carrier having a path of unvarying length, and a stop attached to the main frame to enga-gethe shank of the,

shoe and to resist unyielding pressure of the shoe moved thereagainst by the jack vso as to position it with respect to the' limit of the cutting movement of the knife, power-transmitting mechanism for' positively reciprocating saidv knife carrier, and mechanism for moving saidv jack to enga-ge the shank of the shoe with said stop and the heel of the shoe With said yielding rest plate. Y

2. A power-driven hel-breasting machine, comprising a main frame, a reciprocatory jack, a knife moved in an unvarying path to breast the heel, a power shaft and power-transmittin mechanism to reciprocate said knife, a Xed shank-engaging stop to 4position the shoewith respect to the V knife, and a spring-tensioned member mounted upon the frame independently of the knife and the jack yieldingly to engage the` face of the heel and press the heel against the jack.

In testimony whereof I have affixed my 'I signature, in presence of two Witnesses.

EDWARD ERICKSON. YVitnesses E. BATCHELDER, A. L. FoLsoM. 

